pytestplugin/hooks: drop setting of unused variable from pytest_collection_modifyitems

have_feature is set a few lines below without consideration of its
previous value, so drop this statement.

Signed-off-by: Bastian Krause <[email protected]>

Author: Bastian-Krause

labgrid/pytestplugin/hooks.py

@@ -53,7 +53,6 @@ def pytest_configure(config):
 def pytest_collection_modifyitems(config, items):
     """This function matches function feature flags with those found in the
     environment and disables the item if no match is found"""
-    have_feature = []
     env = config._labgrid_env
 
     if not env: